Extreme Networks ExtremeWare XOS Command Reference Manual page 278

ExtremeWare XOS 11.5 supports only the Summit X450 family of switches and the BlackDiamond 8800 series switch.
Commands for Managing the ExtremeWare XOS Software
The following is sample output from the Summit X450 series switch:
Process Name
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stp
History
This command was first available in an ExtremeWare XOS 10.1.
Platform Availability
This command is available on all platforms.
278
Hello HelloAck Last Heartbeat Time
50870 50870 Tue Feb 10 05:22:13 2004
ExtremeWare XOS 11.5 Command Reference Guide